21 results about "Fixed carbon" patented technology

This invention relates to the field of iron and steel smelting technology, and proposes a method for improving the sintering uniformity of sintering mixtures. The method includes: preparing a first mixture for laying on the lower layer of a sintering machine trolley, and a second mixture for laying on the upper layer thereon, wherein the mass percentage of the first mixture is higher than that of the second mixture, the mass content of fixed carbon in the first mixture is lower than that in the second mixture, and the mass percentage of limestone in the flux used in the first mixture is higher than that in the second mixture; the first mixture is firstly distributed at the head of the sintering machine, and then the second mixture is secondly distributed at the head of the sintering machine; after the distribution is completed, sintering is performed by suction ignition. This invention improves the uniformity of strength and yield between the upper and lower layers of sintered ore, and increases sintering production efficiency.

A reducing agent for industrial silicon smelting and its preparation method are disclosed. The reducing agent raw materials include 80 wt.%–90 wt.% low-rank non-caking coal powder and 10 wt.%–20 wt.% biomass binder. In the preparation of the reducing agent, biomass and low-rank non-caking coal are separately ground into powder. The biomass powder is then subjected to alkali treatment and hydrothermal treatment to obtain the biomass binder. The biomass binder and the low-rank non-caking coal powder are mixed evenly. Simultaneously, during the mixing process, a solution of alkali metal or alkaline earth metal, water, and an inorganic binder solution are sequentially and uniformly sprayed onto the mixture. The materials are mixed evenly and agglomerated. Then, they are cold-pressed under a pressure of 10-15 MPa to obtain pellets. The pellets are then calcined at a temperature of 400-600℃ under anaerobic conditions for 10-30 hours, and cooled to room temperature in the furnace to obtain composite carbonaceous reducing agent pellets for industrial silicon smelting. The reactivity of the composite carbonaceous reducing agent pellets of this invention can reach more than 99% at 1000℃, with fixed carbon of not less than 75 wt.%, volatile matter of 12 wt.%-20 wt.%, moisture of less than 2 wt.%, and ash of less than 4 wt.%.

The present application provides a gasification slag extraction and recycling system and process to solve the problems of complex process, low recovery rate, high cost, and failure to achieve ideal utilization value, and inability to effectively improve the comprehensive utilization efficiency of gasification slag. The system includes a clean water pool, a gasification slag stirring pool, a first vibrating screen, a first sorting machine group, a second sorting machine group, and a second filter press; the discharge port of the gasification slag stirring pool is connected with the feed port of the first vibrating screen; the under-screen discharge port of the first vibrating screen is connected with the feed port of the first sorting machine group; the coarse concentrate discharge port of the first sorting machine group is connected with the feed port of the second sorting machine group; the concentrate discharge port of the second sorting machine group is connected with the second filter press. Glass crystals, tailing coarse particles, high-ash, fine tailings, fixed carbon, high-heat quality coal, and fine coal products are obtained by separating and extracting from the gasification slag using the system, which can be directly sold or recycled through a recycling production line.

In some variations, the present invention provides a biochar composition comprising: a low-fixed carbon material having a fixed carbon concentration of 20 wt% to 55 wt%; a high-fixed carbon material having a fixed carbon concentration of 50 wt% to 100 wt% (and higher than that of the low-fixed carbon material); 0 to 30 wt% moisture; 0 to 15 wt% ash; and 0 to 20 wt% of one or more additives (such as binders). Some variations provide a method for producing a biochar composition, the method comprising: pyrolyzing a first biomass-containing feedstock to produce a low-fixed carbon material; pyrolyzing a second biomass-containing feedstock separately to produce a high-fixed carbon material; blending the low-fixed carbon material with the high-fixed carbon material to produce an intermediate material; optionally blending one or more additives into the intermediate material; optionally drying the intermediate material; and recovering the biochar composition containing the intermediate material or a heat-treated form thereof.

The present application belongs to the technical field of geochemistry, and particularly relates to the estimation of the carbon flux of the earth system, and especially relates to a method and system for estimating the carbon flux of the deep-time earth system. The method for estimating the carbon flux of the deep-time earth system provided by the present application solves the four defects in the traditional technology caused by the fixed carbon pool assumption, the neglect of the atmospheric / biosphere carbon content, the isotopic error, and the failure to consider the fractionation effect through dynamic carbon pool segmentation, the inclusion of multi-sphere isotopic composition, and the correction of fractionation effect. The high-precision and verifiable model framework not only improves the scientificity of the deep-time carbon cycle research, but also provides a key tool for analyzing the climate evolution mechanism in the geological history period and predicting the future climate change trend, and has important theoretical innovation and practical application value.

The application belongs to the technical field of biomass resource utilization, and discloses a corn straw biochar preparation method and system based on pyrolysis temperature regulation, which comprises the following steps: drying, crushing and sieving corn straw, placing the corn straw in a pyrolysis reactor, discharging air by introducing inert gas, heating to the pyrolysis temperature at a set heating rate and keeping constant temperature, and finally cooling and collecting the solid product. By precisely controlling the pyrolysis temperature, the method realizes the synergistic regulation of the pore structure, fixed carbon content, volatile matter and potassium occurrence form of the corn straw biochar. Compared with the prior art, the method does not need to add chemical modifiers, and the process conditions are mild and controllable, effectively solving the problems of strong hydrophilicity, high viscosity and poor fluidity of traditional biochar used in coal water slurry system, and improving the stability and conveying performance of the biochar-coal powder multi-component slurry.

The present invention aims to provide a system and method for evaluating carbon dioxide fixation, which, when carbon dioxide is fixed via a carbonate precipitation reaction, eliminates the need for crystal growth-related operations, enabling simple quantification of the amount of fixed carbon dioxide and accurate evaluation of the carbon dioxide fixation. To address the above-mentioned problems, a system and method for evaluating carbon dioxide fixation are provided. The system comprises: a reaction unit that performs a carbonate precipitation reaction related to carbon dioxide fixation under conditions of preferential calcium carbonate precipitation; a first measuring unit and a second measuring unit that measure the calcium ion concentration before and after the reaction; and a calculation unit that quantifies the amount of fixed carbon dioxide based on the measurement results of the first and second measuring units. According to the present invention, the amount of carbon dioxide fixation can be easily quantified and accurately evaluated without the need for crystal growth-related operations.

The utility model relates to anode carbon block preparation technical field, and disclose prebaked anode carbon block surface conductive enhancement treatment equipment, including support frame main part and antiskid foot still include modifier solution tank, coal pitch powder tank and powder collection tank, one side of modifier solution tank is equipped with coal pitch powder tank, one side of coal pitch powder tank is equipped with powder collection tank, fixed mounting has trackless pneumatic cylinder between two support frame main parts, and the moving platform of trackless pneumatic cylinder is equipped with the fixed assembly for clamping and fixing carbon block, the utility model realizes the enhancement of conductivity by smearing modifier and adhering coal pitch powder to carbon block surface in the process of moving, after the adhesion of coal pitch powder is completed, the excess coal pitch powder on the surface of carbon block is shaken down by the top block three, and the shaken coal pitch powder falls into the powder collection tank to complete recovery, while ensuring the adhesion efficiency of conductive material, the waste of coal pitch powder is avoided, thereby the utilization rate is improved.

The present application provides a kind of with sintering desulfurization denitration activated carbon and blast furnace injection coal blending method of coking coal, it is related to blast furnace smelting technical field, including the following steps: obtaining the volatile content, fixed carbon content, ash content and sulfur content of original blast furnace injection mixed coal powder;Based on the volatile content, fixed carbon content, ash content and sulfur content of original blast furnace injection mixed coal powder, the proportion of coking coal and the proportion of sintering desulfurization denitration activated carbon are calculated;According to the calculated proportion of coking coal and sintering desulfurization denitration activated carbon, coking coal and sintering desulfurization denitration activated carbon are mixed with anthracite, bituminous coal, lean coal, lean and lean coal, lignite one or several, to obtain blast furnace injection mixed coal powder.The present application saves valuable coal resources, substantially reduces the cost of coal blending, and achieves the effect of rational utilization of these secondary heat and carbon resources.

The application discloses an energy consumption estimation method based on an extended blast furnace Rist operation line, which is based on the calculation of the blast furnace Rist operation line, organizes and calculates the blast furnace process data, the data including the carbon content dissolved in the molten iron and the solid carbon content in the furnace dust ash; the carbon content dissolved in the molten iron and the solid carbon content in the furnace dust ash are substituted into the calculation of the blast furnace Rist operation line, the horizontal and vertical coordinates of points A and E are calculated according to the measurement results; the AE operation line is obtained by connecting the points A and E, the slope of the AE operation line is converted into the carbon ratio of the blast furnace smelting, and then the carbon consumption of the blast furnace fuel is represented; thus, under the condition of considering hydrogen reduction, the carbon content dissolved in the molten iron and the solid carbon content in the furnace dust ash are identified as fixed carbon, the carbon dissolved in the molten iron and the solid carbon in the furnace dust ash are regarded as active carbon elements in the blast furnace ironmaking, and are substituted into the calculation of the blast furnace Rist operation line, so as to reduce the calculation error of the carbon consumption and expand the capacity of the blast furnace Rist operation line.

This invention relates to the field of carbon ash separation technology, and more particularly to a carbon ash separation treatment method for gasification slag recovery, comprising: determining whether the ultrasonic treatment of the gasification slag is qualified based on the carbon enrichment rate of fixed carbon in the gasification slag with a preset particle size; in response to the qualified ultrasonic treatment of the gasification slag, determining the total drying time of the gasification slag based on the specific capillary water absorption time of the gasification slag; determining whether the drying of the gasification slag meets the standard based on the change rate of the specific capillary water absorption time of the gasification slag, so as to correct the remaining drying time; determining the addition of a modifier to chemically modify the gasification slag based on the angle of repose of the gasification slag, and determining the modifier and the amount of modifier added based on the specific capillary water absorption time after drying; determining whether the electrostatic treatment is qualified based on the change rate of the angle of repose of the gasification slag during the electrostatic treatment process, and in response to the qualified electrostatic treatment, determining that the carbon ash separation of the gasification slag is completed. This invention improves the carbon recovery rate and concentrate quality of carbon ash separation.

This solid fuel comprises: a biomass carbonized material having at least 74 mass% of fixed carbon on an anhydrous ash-free basis; and an inorganic binder having a CaO content of at least 50 mass% in a dry state.

This invention belongs to the field of iron and steel metallurgical production technology, and particularly relates to a closed-loop control method for FeO content in sintered ore based on multi-source information collaboration. The specific steps are as follows: S1: Feedforward sensing and dynamic benchmark calculation: Real-time acquisition and input of iron grade, chemical composition, and fixed carbon content data of the homogenized ore in the mixture, as well as the circulation volume and residual carbon content data of the returned ore; a time-series smoothing algorithm is used to process the homogenized ore carbon data to predict its short-term trend; S2: Dual carbon source collaborative regulation: Setting the target FeO content of the sintered ore and the corresponding target total carbon demand according to the process requirements, and calculating the real-time set value of the external fuel carbon according to the compensation formula; S3: Multi-temperature information fusion and feedback verification. This method, through feedforward compensation of core disturbances and combined with multi-dimensional feedback, comprehensively diagnoses the thermal state of the sintering process and the sensible heat of the finished sintered ore, achieving precise fuel supply, reducing solid fuel consumption, reducing the standard deviation of FeO content in the sintered ore, and improving the internal control hit rate.

The present application relates to iron-making technology field, especially relates to a kind of blast furnace injection coal blending method using sintering desulfurization denitration activated carbon and flux, add flux and sintering desulfurization denitration activated carbon in blast furnace initial injection mixed coal powder, according to the composition of blast furnace initial injection mixed coal powder and flux, the calculated ratio of sintering desulfurization denitration activated carbon and flux is added into the ratio, under the condition that the calculated ratio of sintering desulfurization denitration activated carbon and flux remains unchanged, the proportion of each component of blast furnace initial injection mixed coal powder is adjusted: first, the proportion of sintering desulfurization denitration activated carbon and solvent is deducted from total ratio, then the proportion of each coal of remaining injection mixed coal powder is reduced by the same proportion.The present application can actively regulate and control the volatile matter, fixed carbon, ash and sulfur content of mixed coal powder, especially can reduce sulfur load, reduce the harm of sulfur cycle in blast furnace.At the same time, save coal powder resources, substantially reduce the cost of coal blending.

The application discloses a bottom water injection steel slag pretreatment device capable of synergistically fixing carbon. An opening is arranged at the top of a slag pool, a cover body is hinged to the edge of the slag pool, a driving mechanism is installed on the ground and connected to the cover body, a first CO2 concentration detection unit is arranged on the cover body, a water supply and drainage system comprises a water pipeline connected to the bottom of the slag pool, a first valve arranged on the water pipeline and a first flow meter, and a kiln waste gas gas supply system comprises a gas delivery pipeline connected to the bottom of the slag pool, a second valve arranged on the gas delivery pipeline, a second flow meter and a second CO2 concentration detection unit. The application reduces the CO2 emission of enterprises, helps to alleviate the greenhouse effect, further reduces the content of free calcium oxide and magnesium oxide in the steel slag, improves the stability of the subsequent steel slag tailings, and significantly improves the resource utilization value of the tailings.

A slag stabilizer according to one example of the present invention comprises a lime-based flux containing limestone or dolomite, steelmaking slag containing, in weight percent, CaO: 30% or more and 45% or less, total Fe: 15% or more and 30% or less, SiO2: 5% or more and 20% or less, MgO: more than 5% and 15% or less, and anthracite containing fixed carbon: 70% or more and 90% or less, ash: 8% or more and 18% or less, volatile matter: 5% or more and 15% or less, or a carbon-based flux containing sedimentation tank dust, wherein, based on the total slag stabilizer, the lime-based flux may comprise 30% or more and 45% or less, the steelmaking slag may comprise 30% or more and 45% or less, and the carbon-based flux may comprise 10% or more and 25% or less.

The invention relates to a method and a combustion device for burning the volatile components of a solid biomaterial fuel charge (22) and recovering the solid carbon of the biomaterial, the combustion device comprising: 1. A charge compartment (18), which opens at its upper part from an opening in the bottom of the combustion chamber (12) into the combustion chamber, and which is arranged inside the charge chamber (13). 2. An air control lip (191), the lower part of which is inside the charge compartment such that a primary air supply gap (193) remains between the inner surface of the upper edge of the charge compartment and the outer surface of the air control lip, which guides the primary air downward along the inner surface of the charge compartment, and the upper part of which is above the upper edge (182) of the charge compartment, and the upper part of which has secondary air openings (192), and which is connected to the metallic structure above the air control lip. 3.An air guide (20) resting freely on the fuel charge, which directs part of the air through the opening in the middle of the air guide to the middle of the charge and part of the air flows under the air guide from the gap between the outer edge of the air guide and the inner surface of the charge compartment. 4. From the top of the combustion chamber of the right cheek duct (14) to the charge chamber. Hot flue gases are led into the charge chamber along the cheek duct to heat the charge container from the outside, whereby the fuel charge is pyrolyzed inside the charge compartment and the pyrolysis gases burn in the combustion chamber under the influence of secondary air.

This invention relates to the field of blast furnace smelting technology and discloses a pulverized coal injection fuel for blast furnace smelting of vanadium-titanium magnetite. The fuel is composed of the following coal blends by mass percentage: 50-55% anthracite, 30% bituminous coal, and 15-20% semi-coke. The anthracite has a fixed carbon content of 80.24%, an ash content of 12.44%, and a volatile matter content of 7.32%; the bituminous coal has a fixed carbon content of 61.48%, an ash content of 8.44%, and a volatile matter content of 30.08%; and the semi-coke has a fixed carbon content of 79.69%, an ash content of 11.17%, and a volatile matter content of 9.14%. The pulverized coal injection fuel provided by this invention exhibits good combustion performance, reduces the generation of unburned coal powder, inhibits the formation of Ti(C,N) particles, and ensures the stable and smooth operation of the blast furnace smelting of vanadium-titanium magnetite. It contains an optimally proportioned semi-coke blend, realizing the application of semi-coke as a pulverized coal injection fuel in blast furnaces for vanadium-titanium magnetite smelting.

A method for capturing and releasing carbon dioxide (CO2) includes contacting a nanoporous carbon (NPC) material with a CO2-containing gas stream, thereby at least partially absorbing CO2 in the form of molecules on surfaces and pores of the NPC material to form a sample; releasing the CO2 from the sample by thermally heating the sample or exposing the sample to a pressure swing adsorption (PSA) unit; and collecting the CO2. A method of making the NPC material by heating one or more low fixed carbon feeds in the presence of one or more metal salts is also disclosed.

This invention relates to a synergistic thermochemical conversion device and method based on the separation of biomass volatile matter and fixed carbon, belonging to the field of clean biomass power generation and heating. It solves the problem of poor equipment stability and high maintenance costs caused by the difficulty in synergistically suppressing coking and slagging during existing biomass combustion processes. The device includes a boiler body, the inner cavity of which is divided into a separation chamber and a combustion chamber by a partition. The partition has an air vent at the top and a solid material transport port at the bottom. A chain grate is located at the bottom of the boiler, and a fan unit is located on the side, supplying air to the separation chamber and below the chain grate, respectively. Biomass enters the separation chamber and undergoes pyrolysis and partial oxidation reactions under a gasification medium, producing tar-containing volatile matter and solid biochar. The volatile matter enters the upper part of the combustion chamber through the air vent for complete oxidation. The solid biochar falls onto the chain grate and is transported to the lower part of the combustion chamber for reduction reactions in a reducing atmosphere. This achieves the separation of volatile matter gas and solid biochar. It is used for high-temperature thermochemical conversion of biomass.